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Note C - Finance Receivables, Net - Changes in Finance Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Balance	$ 854,290	$ 625,119
Finance receivable originations	287,416	234,893
Finance receivable collections	(103,879)	(97,342)
Provision for credit losses	(82,903)	(54,108)
Losses on claims for accident protection plan	(6,108)	(4,518)
Inventory acquired in repossession and accident protection plan claims	(29,358)	(15,451)
Balance	$ 919,458	$ 688,593

X

- Definition

Finance receivable collections

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents finance receivable origination.

+ References

No definition available.

+ Details

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Namespace Prefix:	crmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Inventory acquired in repossession and payment protection plan claims

+ References

No definition available.

+ Details

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Namespace Prefix:	crmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Losses on claims for payment protection plan

+ References

No definition available.

+ Details

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Namespace Prefix:	crmt_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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